Anyone else using a China phone? Tell me about it.

I've been using a Redmi 4X for about a year now, mi daugther a Redmi 3, a nephew has now a Mi 6 and it is really nice, 6Gb Ram and 64Gb storage, the only thing is that it doesn't have the option to use a micro sd card like other models that can use up to 128GB of extra space still two sim cards can be used, and can handle several apps and games and no noticeable impact in the performance.